JPH0865715A - Method and device for stereoscopic video display - Google Patents

Abstract

PURPOSE: To eliminate or reduce the lack of stereoscopic expression for the front images shown at the parts around a display frame. CONSTITUTION: The virtual screen frames A and B are set in front of a monitor display frame 1 to prescribe the display ranges of the left and right eye front display media 2 and 3 respectively. Thus an observer can recognize a stereoscopic image in the depth directions of both frames A and B. As these frames A and B are separate from each other by an extent equal to a parallax set between both eyes, the medium 2 gets out of the frame A and lacks a screen like the medium 3 when this medium gets out of the frame 1. Thus an uneven lacking state is never caused between the right and left eyes and the satisfactory stereoscopic expression is always secured at the parts around the frame 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereoscopic image display method in which independent images for the left eye and the right eye are superposed and displayed on a monitor, and the images are independently recognized by using polarization or another method. The present invention relates to a stereoscopic image display device.

[0002]

2. Description of the Related Art Conventionally, as a video display device, a direct view type or projection type video display device using a cathode ray tube (CRT), a liquid crystal panel or the like has been widely used.

On the imaging side, the screen is decomposed into pixels by sampling the image in two dimensions horizontally and vertically, and in a video display device, pixels are generally displayed two-dimensionally by line-sequential driving or matrix driving. To form one screen. As described above, the video display device basically has a two-dimensional expression capability.

On the other hand, in recent years, a video display device capable of stereoscopic video recognition has been developed. Humans perceive an object three-dimensionally by the binocular parallax of the eyes. That is, it can be physically considered that the distance between the right eye and the left eye produces stereoscopic vision.
Therefore, it is possible to stereoscopically record an image by capturing the same subject with two cameras that match the distance between the eyes of a human and capturing the images corresponding to the left and right eyes of the human with each camera. In the video display device, by giving the left image to the left eye and the right image to the right eye, an image with a sense of perspective corresponding to the divergence angle (angle formed by the optical axes) of the two cameras can be obtained.

As a method of selectively giving the left image and the right image to the left and right eyes, for example, the left image and the right image are switched by time division for display, and the left and right shutters are opened and closed in synchronization with this switching. There is a method of viewing using shutter glasses. There is also a method in which the left image and the right image are polarized orthogonally to each other and superimposed and displayed, and the images are viewed using polarizing glasses in which the left eye and the right eye have orthogonal polarization directions.

In the stereoscopic display method as described above, a stereoscopic front image (an object image located in front of the background in an imaged state) is recognized on the display surface in the monitor display frame together with the background image.

However, in the above-described stereoscopic display method, although stereoscopic recognition can be obtained in the central portion of the screen, good stereoscopic recognition cannot be obtained in the vicinity of the left and right end portions of the screen. FIG. 7 is an explanatory diagram for explaining this problem.

In FIG. 7, a background is displayed on the monitor display frame 1, and together with the background, a left-eye image (hereinafter referred to as a left-eye front display medium) 2 which constitutes the front image.
Is displayed with a first polarization direction, and a right-eye image (hereinafter, referred to as a right-eye front display medium) 3 that constitutes the front image is a second polarization that is orthogonal to the first polarization direction. It is displayed with the direction. In FIG. 7, the front image is stereoscopically displayed in the vicinity of the display frame 1, but the image of the left half of the front display medium 3 for the right eye (the portion shown by the dotted line) is not included in the range of the display frame 1 and is missing. It is in the state of doing. When this is viewed through polarizing glasses having a polarization direction for the left eye and a polarization direction for the right eye, the front display medium 2 for the left eye enters the left eye as it is, as shown by reference numeral 4, but the front display medium 3 for the right eye.
However, since the stereoscopic image is lacking in the right eye, good stereoscopic recognition cannot be obtained, and there is a problem that a stereoscopic effect is insufficient near the peripheral portion of the screen as compared with a stereoscopic image near the central portion of the screen, which causes a feeling of strangeness.

Therefore, on the imaging side, the stereoscopic front image is
It is necessary to limit it to only near the center of the screen as much as possible.On the other hand, on the image receiving side, it is necessary to tolerate such defects that often appear, and as a result of the efforts of the imaging side, the central part of the screen is described above. It was only a stereoscopic image, and only a half-dimensional 2.5D stereoscopic effect was obtained.

[0010]

As described above, the conventional stereoscopic image display has a problem that good stereoscopic display cannot be obtained near the left and right edges of the screen.

In view of the above problems, it is an object of the present invention to provide a stereoscopic video display method and a stereoscopic video display device capable of avoiding or reducing the lack of stereoscopic representation of a front image in the peripheral portion of a display frame. It is what

[0012]

According to the first aspect of the present invention,
In the stereoscopic image display method in which independent images are displayed for the left eye and the right eye using polarization and other methods, and any image is recognized in front of the actual display position, the left eye or the right eye is displayed in front. When one display medium for the eye is in a state of falling out of the display frame, a similar lack state is formed in the other front display medium for the left eye or the right eye that is not missing, It is characterized in that a three-dimensional front image is formed in the peripheral portion of the display frame.

According to a second aspect of the present invention, a stereoscopic image display method in which an independent image is displayed for the left eye and the right eye using polarization and other techniques and an arbitrary image is recognized ahead of the actual display position. At the front position in the display frame, the first virtual screen frame for the right eye is set to regulate the display range of the front display medium for the right eye, and the display range of the front display medium for the right eye is shifted by a distance corresponding to the binocular parallax for the left eye. A second virtual screen frame is set to regulate the display range of the front display medium for the left eye, and the entire image is displayed within the first and second virtual screen frames.

According to a third aspect of the present invention, in the stereoscopic image display method according to the first aspect, the formation of the lacking state is performed by using an arbitrary image for the left eye or right eye front display medium which is not lacking. It is characterized by being performed by masking.

According to a fourth aspect of the present invention, in the stereoscopic image display method according to the first or third aspect, the lacking state is formed by a front display medium for the left eye or the right eye which is not lacking.
It is performed by masking with the background image of the front display medium that is missing.

According to a fifth aspect of the present invention, in the stereoscopic image display method according to the first or third aspect, the lacking state is formed by a front display medium for the left eye or the right eye, which is not lacking.
It is performed by masking with a background image from a separately provided background image generation source.

According to a sixth aspect of the invention, a stereoscopic image display method is provided in which independent images are displayed for the left eye and the right eye using polarization and other techniques, and an arbitrary image is recognized in front of the actual display position. In, arbitrarily inside the display frame, set a virtual screen frame that regulates the display range of the background image, the background image for the right eye and the left eye are all displayed in the virtual screen frame, for the right eye and the left The front display medium for an eye is characterized in that it is displayed beyond the virtual screen frame when it exceeds the virtual screen frame.

According to a seventh aspect of the present invention, there is provided a stereoscopic image display device, which generates independent right eye image signals and left eye image signals capable of stereoscopic display for the right eye and the left eye, and the right eye. First storage means for storing one screen image signal for the eye, second storage means for storing one screen image signal for the left eye, and outputs from the first and second storage means The front medium detection device for detecting the front display medium for the right eye and the left eye, and the front display medium for the right eye and the left eye from the front medium detection device are compared, and either one of An absence detection device that detects the absence of the front display medium, and when this lack detection device detects the absence of the front display medium for either the right eye or the left eye, the image of the one that is not missing is stored. Only in the address period corresponding to the lacking portion of the first or second storage means, The output of the means is switched to the output from the second or first storage means that is lacking, and when the lack detection device does not detect the lack of the front display medium, the first, second Image output switching means for outputting the respective right-eye and left-eye video outputs from the storage means as they are.

According to the eighth aspect of the present invention, there is provided a stereoscopic image display device, which generates independent right-eye image signal and left-eye image signal capable of stereoscopic display for the right eye and the left eye, and the right eye. First storage means for storing one screen image signal for the eye, second storage means for storing one screen image signal for the left eye, and outputs from the first and second storage means The front medium detection device for detecting the front display medium for the right eye and the left eye, and the front display medium for the right eye and the left eye from the front medium detection device are compared, and either one of An absence detecting device for detecting the absence of the front display medium, a background image signal generating means, and a lack when the absence detecting device detects the absence of the front display medium for either the right eye or the left eye. It corresponds to the lacking part of the first or second storage means that stores the image of the other Only during the address period, the output of the storage means is switched to the background image signal from the background image signal generation means and output, and when the absence detecting device does not detect the absence of the front display medium, the first, Image output switching means for outputting the respective right-eye and left-eye video outputs from the second storage means as they are is provided.

According to a ninth aspect of the present invention, there is provided a stereoscopic image display device, which generates independent right eye image signal and left eye image signal capable of stereoscopic display for the right eye and the left eye, and the right eye. First storage means for storing one screen image signal for the eye, second storage means for storing one screen image signal for the left eye, and outputs from the first and second storage means And an output from the first and second storage means and an arbitrary range difference detection device for determining whether or not a difference integral value in an arbitrary small display range is less than or equal to a set value. ,
When it is determined that the difference detection device within the arbitrary range is less than or equal to the set value, it is determined that the background screen is a background screen, and a background screen storage unit that always stores and updates the image of only that part,
From the input / output signals of the first and second storage means, a motion detection circuit that detects the motion of the background and outputs a motion vector is compared with the output from the first and second storage means, and the right eye is compared. Medium detection device for detecting the front display medium for the left and right eyes and the front display medium for the right eye and the left eye from this front medium detection device are compared, and the lack of one of the front display medium is checked. The lack detection device for detecting, the front medium detection device detects the front medium, and the lack detection device detects the lack. When the background is a still image, the lack corresponding mask screen is set to the mask same position address of the background screen storage means. If the background is a moving image, the motion vector component obtained from the motion detection circuit is added / subtracted to / from the background screen storage unit when the background is a moving image. Reading from the means, characterized by comprising an image output switching means for outputting as a mask image.

[0021]

According to the first aspect of the invention, when an image of an arbitrary display medium to be displayed in front is out of the display frame and is missing,
By taking the same lacking form for both the left-eye and right-eye images, it is possible to avoid or reduce the inconvenience of incomplete stereoscopic display near the periphery of the display frame.

According to the second aspect of the invention, if the left-eye and right-eye virtual screen frames are set in front of the display frame,
The observer recognizes a stereoscopic image in the depth direction of the set virtual screen frames for the left and right eyes. Moreover, if the left-eye and right-eye virtual screen frames are set separately for binocular parallax, for example, when the front display medium for the right eye is missing from the right-eye virtual screen frame, the The front display medium for the left eye on the other hand also comes off the virtual screen frame for the left eye to enter the same screen-missing state as the display medium for the right eye, so that the problem of lack of misalignment does not occur.

According to the third aspect of the present invention, when the first front display medium for the left eye or the right eye starts to lack from the display frame, the second front display for the right eye or the left eye. Since the second front display medium is masked with an arbitrary image so that the medium also has the same lacking form, the problem of lack of misalignment does not occur.

According to the fourth and fifth aspects of the invention, when the first front display medium for the left eye or the right eye begins to be lacking from the display frame, the second for the right eye or the left eye is displayed. The front display medium is also
The second front display medium is masked with an arbitrary image so as to have the same lacking form. Although there is a problem that the background image does not become the original background image depending on the background image, since the behavior of the front display image, which is highly noticeable, is the same for both eyes, the discomfort is halved, and the defect of lack of uniformity is corrected.

According to the sixth aspect of the present invention, the virtual screen frame is provided inside the display frame, all the background is displayed in the virtual screen frame, and only the front display medium protrudes the virtual screen frame as necessary. In this case, the front display medium beyond the virtual screen frame is not lacked in the protruding range, and a stereoscopic image can be expressed without any trouble in the peripheral portion of the virtual screen frame.

According to the seventh aspect of the invention, when the lack of the front display medium for either the right eye or the left eye is detected, the one of the storage means storing the image which is not missing is detected. Only in the address period corresponding to the lacking part, the output of the non-missing storage means is switched to the output from the missing storage means for output. For example, when a part of the front display medium for the right eye is missing, the lack corresponding portion of the front display medium for the left eye that is not missing is replaced with the background image for the right eye corresponding to the missing portion. It becomes possible to mask.

According to the eighth aspect of the invention, when the lack of the front display medium for either the right eye or the left eye is detected, only the address period corresponding to the lacking portion of the one storage means is lost. The output of the other storage means, which is not provided, is output by switching to the background image signal from the separately provided background image generation source, so that it is more natural for the image for which the background image cannot be obtained even for the other-eye image. It is possible to express various stereoscopic images.

According to the ninth aspect of the present invention, the latest background image is always stored in the background screen storage means, and when the background is a still image, the mask screen corresponding to lack is masked in the background screen storage means. When the background image is read out from the same position address and output as a mask image, and the background is a moving image, the motion vector component obtained by the motion detection circuit is added to or subtracted from the mask address position of the background screen storage means, and the background screen is displayed. Since it is output as a mask image from the storage means,
It is possible to obtain a mask background image having no discomfort whether the background is a still image or a moving image.

[0029]

An embodiment will be described with reference to the drawings.

In the embodiment shown below, image information from the two cameras placed at positions corresponding to the left eye and the right eye is used for the left eye,
For the right eye, the polarization directions are orthogonal to each other, the image is displayed on the screen in the monitor display frame, and the left eye and the right eye are separated by using the polarization glasses having the polarization directions orthogonal to each other. The present invention relates to a stereoscopic video display method and a stereoscopic video display device that perform independent video display on the right eye and recognize an arbitrary video in front of an actual display position.

FIG. 1 is a diagram showing a stereoscopic image display method according to an embodiment of the present invention.

In the embodiment shown in FIG. 1, virtual screen frames A for restricting the display ranges of the left-eye and right-eye front display media, respectively.
B is set in front of the display screen. A virtual screen frame A for the left eye showing the displayable range of the front display medium 2 for the left eye at the front position on the right side in the drawing of the display screen of the monitor display frame 1.
Meanwhile, the left-eye virtual screen frame B indicating the displayable range of the front display medium 3 for the right eye is set to the left of the figure with respect to the position of the virtual screen frame A for the left eye. Therefore,
The right-eye virtual screen frame B is on the left side of the monitor display frame 1 in the figure,
The left-eye virtual screen frame A is set to the right of the monitor display frame 1 in the figure, and the left-eye virtual screen frame A and the right-eye virtual screen frame B are displaced from each other by an amount corresponding to the parallax of both eyes. Set to state.

In such a stereoscopic image display method, since the left-eye and right-eye front display media 2 and 3 are displayed within the ranges of the virtual screen frames A and B, respectively, the right-eye front display media is displayed. When a part of 3 is out of the monitor display frame 1 (that is, out of the virtual screen frame B), a part of the left-eye front display medium 2 is also out of the virtual screen frame A. The front display medium 2 with the left eye and the right eye as shown in the conventional example 7
The lacking state of 3 does not become irregular, and the left eye and the right eye images both have the same lacking shape in the vicinity of the peripheral portion of the monitor display frame 1 to avoid the incomplete stereoscopic display. be able to.

FIG. 2 is a diagram showing a stereoscopic image display method according to another embodiment of the present invention.

In the embodiment shown in FIG. 2, one of the left-eye and right-eye front display media 2 and 3 is the monitor display frame 1.
In the case where the front display medium 3 which is not missing is masked, a part of the front display medium 3 which is not missing is masked with an arbitrary image so that the missing forms of the front display media 2 and 3 are aligned with both eyes. is there. In the figure, the portion indicated by the dotted line D of the front display medium 3 for the right eye is missing, and the front display medium 2 for the left eye corresponding to this portion is missing.
The portion indicated by the diagonal line C is masked with an arbitrary image. As an arbitrary image to be masked, a background image corresponding to the missing display position is extracted and used, or an image obtained from a completely different background image generation source is used. If, for example, the background image of the front display medium 3 for the right eye is used as an image for masking the portion indicated by the diagonal line C of the front display medium 2 for the left eye, the C portion having the polarization direction for the left eye has a different polarization direction. Since it is masked by the background image for the right eye, the effect of lacking the portion C of the display medium 2 for the left eye when viewed with the polarizing glasses becomes greater.

In such a stereoscopic image display method, when one front display medium 3 starts to fall off the monitor display frame 1, the other front display medium 2 is also masked so as to have the same lacking form. It is possible to eliminate the lack of irregularity of the front display media 2 and 3 for both eyes. Since the front display medium having a high degree of attention is displayed in the same lacking form, the stereoscopic effect due to the binocular recognition is not affected.

FIG. 3 is a diagram showing a stereoscopic image display method according to another embodiment of the present invention.

In the embodiment shown in FIG. 3, the virtual screen frame 5 for restricting the display range of the background image is set inside the display surface of the monitor display frame 1, and all the background images are displayed in the virtual screen frame 5. Then, only the front display medium is displayed so as to extend beyond the virtual screen frame 5 as necessary. Since the virtual screen frame 5 in this case is a frame that regulates the background image, the range of the front display medium that can be displayed outside the background image is limited to a predetermined range. In the figure, a part of the front display medium 3 for the right eye (hatched portion D ′) is shown off the virtual screen frame 5, but the hatched portion D ′ outside the virtual screen frame 5 is on the monitor display frame 1. , And the background image corresponding thereto is present in the virtual screen frame 5, and therefore the diagonal line D ′ portion is displayed as it is without being lost, and the stereoscopic image by the front display media 2 and 3 is It is displayed with the background image without omission.

In such a stereoscopic image display method, the virtual screen frame 5 is provided inside the monitor display frame 1 so that the background is entirely displayed in the virtual screen frame 1 and only the front display medium is displayed on the virtual screen if necessary. When the frame 5 is displayed so as to extend, the front display medium beyond the virtual screen frame 1 is not lost in the range that can be extended, and a stereoscopic image is displayed in the peripheral part of the virtual screen frame 5 without any defect. It becomes possible to do.

FIG. 4 is a block diagram showing a stereoscopic image display device according to an embodiment of the present invention.

The embodiment of FIG. 4 shows an example of a device for realizing the stereoscopic image display method shown in the embodiment of FIG. That is, when the image of one front display medium 3 is lacking, the part corresponding to the lacking part of the other front display medium 2 is masked by the background image at the same position of the front display medium 3. It is a thing.

In the frame memories 11 and 12, respectively,
Separate right-eye video signals and left-eye video signals capable of stereoscopic display are supplied from the right-eye and left-eye video signal generating means to the right and left eyes. The frame memory 11 stores the right-eye video signal for one screen. The frame memory 12 also stores the left-eye video signal for one screen. The respective outputs from the frame memories 11 and 12 are supplied to the front medium detecting device 13 while being supplied to the selectors 16 and 17. The front medium detection device 13 compares the outputs from the frame memories 11 and 12 and detects the front display medium for the right eye and the left eye. The front display medium for the right eye and the left eye detected here is the lack detection device 14
Is supplied to. In the lack detection device 14, the front display media for the right eye and the left eye from the front medium detection device 13 are compared,
One of the selectors 16, which detects the lack of one of the front display media and supplies a detection signal to the address counter 15,
It is supplied to 17 selection switching terminals. The address counter 15 supplies write and read addresses to the frame memories 11 and 12, and when there is a lack detection, the address counter 15 designates the read address of the image of the lack detection site in the lack detected frame memory. At this time, at the same time, the lack detection device 14 controls the selector on the side where the lack is not detected so as to select the frame memory output (the image signal corresponding to the lack detected portion) for which the lack is detected.

Therefore, in the selectors 16 and 17, by using the address counter 15, the lack detecting device 14 for the right eye,
When the lack of one of the front display media for the left eye is detected, the output of the frame memory is output only for the address period corresponding to the lacking part of the frame memory 11 or 12 storing the image which is not missing. When the lack detection device 14 does not detect the lack of the front display medium, the output is switched to the output from the missing frame memory 12 or 11, and when the absence of the front display medium is not detected, the right memories from the frame memories 11 and 12 and the left one Each video output for the eye is output as it is.

In this embodiment, the right-eye video signal and the left-eye video signal capable of stereoscopic display are temporarily stored in the frame memories 11 and 12, respectively, and the respective output signals are compared by the front medium detecting device 13. By doing so, the front display medium signal is detected by the inter-frame comparison, and the detected right eye signal,
The front display medium signal for the left eye is supplied to the lack detection device 14, where both front display medium signals are constantly compared, and when either one of the front display media is missing beyond the monitor display frame, The selector 16 or the selector 17 is switched only for the address period corresponding to the missing portion on the other frame memory, and the portion of the front display medium signal of the same portion on the frame memory of the front display medium which is not missing is changed to
The background image signal corresponding to the missing portion is masked and output.

For example, when the front display medium for the left eye is lacking, the selector 16 for the right eye selectively outputs the signal from the frame memory 12 for the left eye, and thus the front display medium for the right eye. Similarly, it is possible to mask and make the image absent.

FIG. 5 is a block diagram showing a stereoscopic image display device according to another embodiment of the present invention.

In the embodiment shown in FIG. 5, the background image signal from the separately provided background image signal source is input to the selector 1
It is configured such that the power is supplied to one of input terminals 6 and 17.

In the frame memories 11 and 12, respectively,
Separate right-eye video signals and left-eye video signals capable of stereoscopic display are supplied from the right-eye and left-eye video signal generating means to the right and left eyes. The frame memory 11 stores the right-eye video signal for one screen. The frame memory 12 also stores the left-eye video signal for one screen. The respective outputs from the frame memories 11 and 12 are supplied to the front medium detecting device 13 while being supplied to the selectors 16 and 17. The front medium detection device 13 compares the outputs from the frame memories 11 and 12 and detects the front display medium for the right eye and the left eye. The front display medium for the right eye and the left eye detected here is the lack detection device 14
Is supplied to. In the lack detection device 14, the front display media for the right eye and the left eye from the front medium detection device 13 are compared,
One of the selectors 16, which detects the lack of one of the front display media and supplies a detection signal to the address counter 15,
It is supplied to 17 selection switching terminals. The address counter 15 supplies write and read addresses to the frame memories 11 and 12. When the lack detection device 14 detects the lack, the selector on the side where the lack is not detected is controlled to select the background image signal from the separately provided background image signal generating means (not shown).

Therefore, in the selectors 16 and 17, when the lack detecting device 14 detects the absence of the front display medium for either the right eye or the left eye by using the address counter 15, it is not missing. Only in the address period corresponding to the lacking part of the frame memory 11 or 12 storing the other image, the output of the frame memory is switched to the background image signal from the background image signal generating means and output to detect the absence. When the device 14 does not detect the lack of the front display medium, the right eye and left eye image outputs from the frame memories 11 and 12 are output as they are.

In this embodiment, the background image signal from the background image signal generation source is input to one input end of each of the selectors 16 and 17, and the right eye is input to each of the other input ends of the selectors 16 and 17. Memory for left and right eye 11, 1
2 is supplied with the video signal, and when one front display medium is missing from the monitor display frame, it is detected and the selector 16 or the selector 17 which is not missing is switched. Thus, the corresponding portion of the other front display medium that is not missing is masked with the background image signal and output.

In the present embodiment, by switching the output of the selector 16 or the selector 17, it is possible to reproduce a more natural stereoscopic image for an image for which the image signal for the background cannot be obtained even with the image signal for the other eye. Become.

FIG. 6 is a block diagram showing a stereoscopic image display apparatus according to another embodiment of the present invention.

The embodiment of FIG. 6 is an embodiment of a system in which the latest background image signal is always stored in the background storage frame memory and the stored background image is masked. In the frame memories 11 and 12, independent right-eye video signals and left-eye video signals capable of stereoscopic display are displayed for the right and left eyes, respectively. Supplied from the generating means. The frame memory 11 stores the right-eye video signal for one screen. The frame memory 12 also stores the left-eye video signal for one screen. The video signal for the right eye and the video signal for the left eye that are input and output to the frame memories 11 and 12 are input to the motion detection circuit 20, and the motion of the background is detected from the signal between the input and output, and the detection The signal is supplied to the address counter 15a and the selectors 16a and 17a. Frame memory 1
The respective outputs from 1 and 12 are the in-range difference detection device 19
To the front side medium detection device 13 and the selector 1
6a, 17a.

The in-arbitrary range difference detecting device 19 compares the outputs from the frame memories 11 and 12 and determines whether or not the difference integral value in an arbitrary small display range is less than or equal to a set value.

If the outputs from the frame memories 11 and 12 can be input to the frame memory 18, and the difference detection device 19 within the arbitrary range determines that the output is less than a set value, it is determined that the frame screen is a background screen. , Always store and update the video of only that part.

The front medium detecting device 13 compares the outputs from the frame memories 11 and 12 and detects the front display medium for the right eye and the left eye. The front display media for the right eye and the left eye detected here are supplied to the lack detection device 14. The lack detection device 14 compares the front display media for the right eye and the left eye from the front medium detection device 13 to detect the lack of one of the front display media and supplies a detection signal to the address counter 15a. On the other hand, it is supplied to the selection switching terminals of the selectors 16a and 17a. The address counter 15a supplies write and read addresses to the frame memories 11, 12 and 18, but when the absence is detected, the address counter 15a designates the read address of the image of the lack detected portion of the background storage frame memory 18. At this time, at the same time, the lack detection device 14 sends the selector on the side where the lack is not detected to
The output of the background storage frame memory 18 (the background image signal corresponding to the lack detection portion) is controlled to be selected.

Therefore, the front medium detecting device 13 detects the front medium and the lack detecting device 14 detects the lack, and the selectors 16a and 17a use the address counter 15a to use the mask screen corresponding to the lack when the background is a still image. Is read from the same mask position address of the frame memory 18 and is output as a mask image. When the background is a moving image, the motion vector component obtained by the motion detection circuit 20 is placed at the mask address position of the frame memory 18. Is added and subtracted and read from the frame memory 18,
Output as a mask image.

In this embodiment, the video signal for the right eye and the video signal for the left eye are temporarily stored in the frame memories 16a and 17a and output to the in-arbitrary range difference detecting device 19. In the in-arbitrary-range difference detection device 19, if the difference integral value for each arbitrary small-range unit is less than or equal to an arbitrary set value, it is recognized as a background screen, and only the arbitrary set portion is overwritten and stored in the background storage frame memory 18. It If such an operation is always performed in the entire screen, the frame memory 18 always has the latest background image stored therein. At the same time, the motion detection circuit 20 detects the motion of the background from the input / output difference signals of the frame memories 16a and 17a, and supplies the motion vector to the address counter 15a.

In this environment, the front display medium detection by the front medium detection device 13 and the lack detection by the lack detection device 14 are performed, and when the background image is a still image, the lack corresponding mask screen is masked in the background storage frame memory 18. It is read from the same position address, and the arbitrary mask output is switched to the background image by the selectors 16a and 17a and is output. If the background image is a moving image, the motion vector component obtained from the motion detection circuit 20 is added to or subtracted from the mask address position of the background storage frame memory 18, and this is added to the selector 16a or the selector 17a as the mask background image. It is output to obtain a picture output video signal.

When the background read address after motion vector correction exceeds the memory range of the frame memory 18, the frame memory 18 outputs a switching signal to the selector 16a or the selector 17a to display the mask processed image. The control for switching to the same-position video signal for the other eye is performed again, and it is possible to avoid the occurrence of an extreme discomfort. In this way, when the background read address is out of the background storage memory range and the background video signal cannot be obtained and mask processing is performed with the video signal for the other eye, some videos do not become the original background image. Occurs, but
Since the three-dimensional lacking form of the front display image with a high degree of attention is aligned for the left and right eyes, the sense of discomfort is halved, and the effect of the present invention is not lost.

[0061]

As described above, according to the present invention, it is possible to provide a stereoscopic image display method and a stereoscopic image display device capable of avoiding or reducing the lack of the stereoscopic representation of the front image around the display frame. It will be possible.

[Brief description of drawings]

FIG. 1 is a diagram showing a stereoscopic image display method according to an embodiment of the present invention.

FIG. 2 is a diagram showing a stereoscopic image display method according to another embodiment of the present invention.

FIG. 3 is a diagram showing a stereoscopic image display method according to another embodiment of the present invention.

FIG. 4 is a diagram showing a stereoscopic image display device according to an embodiment of the present invention.

FIG. 5 is a diagram showing a stereoscopic image display device according to another embodiment of the present invention.

FIG. 6 is a diagram showing a stereoscopic image display device according to another embodiment of the present invention.

FIG. 7 is a diagram showing an example of occurrence of a defect in a conventional stereoscopic image display method.

[Explanation of symbols]

1 ... Monitor display frame, 2 ... Front display medium for left eye, 3 ... Front display medium for right eye, 5 ... Virtual screen frame (background frame), 11,
12 ... Frame memory, 13 ... Front medium detecting device, 14
... absence detection device, 15, 15a ... address counter, 1
6, 17, 16a, 17a ... Selector, 18 ... Background storage frame memory, 19 ... Difference detecting device within arbitrary range, 2
0 ... Motion detection circuit, A ... Left eye virtual screen frame, B ... Right eye virtual screen frame, C ... Mask location, D ... Missing location, D '...
The protruding display area.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Tsutomu Sakamoto, 8 Shinshinsita-cho, Isogo-ku, Yokohama-shi, Kanagawa, Ltd., Toshiba Multimedia Technology Laboratories (72) Inventor, Yoshiji Tsuzuki, 3-chome, Shinbashi, Minato-ku, Tokyo No. 9 within Toshiba Abu E, Inc.

Claims (9)

[Claims] 1. A stereoscopic image display method in which independent images are displayed for the left eye and the right eye using polarization and other techniques, and an arbitrary image is recognized in front of the actual display position. One display medium for the left eye or the right eye,
When the display frame comes off and becomes missing, a similar lacking state is formed on the other front display medium for the left eye or the right eye, which is not missing, and the stereoscopic front is displayed in the periphery of the display frame. A stereoscopic image display method characterized in that an image is formed. 2. A stereoscopic image display method in which independent images are displayed for the left eye and the right eye using polarization and other techniques, and an arbitrary image is recognized in front of the actual display position. The first virtual screen frame for the right eye is set at the front position to regulate the display range of the front display medium for the right eye, while the second virtual screen frame for the left eye is displaced from this by the amount corresponding to binocular parallax. Is set to regulate the display range of the front display medium for the left eye, and all images are displayed within the first and second virtual screen frames. 3. The stereoscopic image display method according to claim 1, wherein the lacking state is formed by masking the left-eye or right-eye front display medium, which is not missing, with an arbitrary image. A stereoscopic image display method characterized by the above. 4. The stereoscopic image display method according to claim 1 or 3, wherein the formation of the lacking state includes a left eye or right eye front display medium that is not missing and a background of the missing front display medium. A stereoscopic image display method, which is performed by masking with an image. 5. The stereoscopic image display method according to claim 1, wherein the lacking state is formed from a background image generating source provided separately for a left eye or right eye front display medium which is not missing. The method for displaying a stereoscopic image, which is performed by masking with a background image of. 6. A stereoscopic image display method in which independent images are displayed for the left eye and the right eye using polarization and other techniques, and an arbitrary image is recognized in front of the actual display position. Inside, set a virtual screen frame that regulates the display range of the background image, all the background images for the right eye and the left eye are displayed in the virtual screen frame, the front display medium for the right eye and the left eye Is a three-dimensional image display method, wherein when the virtual screen frame is exceeded, the virtual screen frame is displayed beyond the virtual screen frame. 7. A means for generating independent right eye video signals and left eye video signals capable of stereoscopic display for the right eye and the left eye, and storing the right eye video signal for one screen. A first storage means, a second storage means for storing the left-eye video signal for one screen, and outputs from the first and second storage means are compared with each other, for the right eye and the left eye. Of the front display medium for detecting the front display medium of No. 1 and the front display medium for the right eye and the front display medium for the left eye from this front medium detection apparatus are compared, and the lack detection apparatus for detecting the lack of one of the front display media And when the absence detecting device detects the absence of the front display medium for either the right eye or the left eye, the lacking part of the first or second storage means that stores the image of the one that is not missing Only during the address period corresponding to
When the lack detection device does not detect the lack of the front display medium, the output from the missing second or first storage means is switched, and the output is switched from the first or second storage means. A stereoscopic video display device, comprising: an image output switching means for directly outputting video outputs for the right eye and the left eye. 8. Means for generating independent right eye video signals and left eye video signals capable of stereoscopic display for the right eye and the left eye; and storing the right eye video signal for one screen. A first storage means, a second storage means for storing the left-eye video signal for one screen, and outputs from the first and second storage means are compared with each other, for the right eye and the left eye. Of the front display medium for detecting the front display medium of No. 1 and the front display medium for the right eye and the front display medium for the left eye from this front medium detection apparatus are compared, and the lack detection apparatus for detecting the lack of one of the front display media A background image signal generating means, and when the absence detecting device detects the absence of the front display medium for either the right eye or the left eye, the first or the first image storing the image not missing Only during the address period corresponding to the lacking part of the second storage means, the output of the storage means is When the background image signal from the background image signal generating means is switched and output, and the lack detecting device does not detect the absence of the front display medium, the right eye from the first and second storage means, A stereoscopic image display device comprising: an image output switching unit that outputs each image output for the left eye as it is. 9. A unit for generating independent right eye video signals and left eye video signals capable of stereoscopic display for the right eye and the left eye, and storing the right eye video signal for one screen. The first storage means, the second storage means for storing the left-eye video signal for one screen, and the outputs from the first and second storage means are compared, and the difference in any small display range is compared. An arbitrary range difference detection device that determines whether or not the integrated value is less than or equal to a set value, and outputs from the first and second storage means can be input and set by the arbitrary range difference detection device. If it is determined that the value is less than or equal to the value, it is determined that it is a background screen, the background screen storage means for always storing and updating the image of only that portion, and the input and output signals of the first and second storage means, A motion detection circuit that performs background motion detection and outputs a motion vector; 1. A front medium detection device that compares outputs from the first and second storage means to detect a front display medium for the right eye and a left eye, and a front medium for the right eye and a left eye from the front medium detection device. When the background is a still image, a comparison is made between display media, and a lack detection device for detecting a lack of one of the front display media, a front media detection by the front media detection device, and a lack detection by the lack detection device are performed. The mask screen corresponding to the lack is read out from the mask same-position address of the background screen storage means and output as a mask image. When the background is a moving image, the mask detection is performed at the mask address position of the background screen storage means by the motion detection circuit. A stereoscopic image display device comprising: an image output switching unit that adds and subtracts the obtained motion vector component and reads it from the background screen storage unit and outputs it as a mask image. .